codeup-web-exercises/konami.html at main · JenniferLA/codeup-web-exercises · GitHub

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<!DOCTYPE html>
<html>
<head>
  <title>Konami Code</title>
</head>
<body>
<h1>Konami Code</h1>

<script>
  "use strict";


  const konamiCode = [
    "ArrowUp",
    "ArrowUp",
    "ArrowDown",
    "ArrowDown",
    "ArrowLeft",
    "ArrowRight",
    "ArrowLeft",
    "ArrowRight",
    "b",
    "a",
    "Enter"
  ];

  let konamiCodeIndex = 0;

  document.addEventListener("keyup", event => {
    if (event.key === konamiCode[konamiCodeIndex]) {
      konamiCodeIndex++;
      if (konamiCodeIndex === konamiCode.length) {
        // Konami Code entered successfully
        document.body.style.backgroundColor = "blue";
        alert("You have added 30 lives!")
        konamiCodeIndex = 0;
      }
    } else {
      konamiCodeIndex = 0;
    }
  });


</script>
</body>
</html>